Fastening device



FIG. 1 is a top plan view of the fastening device.

FIG. 2 is a rear view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is affront view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a perspective view thereof; and,

FIG. 7 is an alternate environmental perspective view thereof.

The broken lines are directed to environment and form no part of the claimed design. 

CLAIM The ornamental design for a fastening device, as shown and described. 